Boa tarde. Precisa preparar a floresta/domínio antes de adicionar/migrar.
https://docs.microsoft.com/pt-br/windows-server/identity/ad-ds/deploy/upgrade-domain-controllers
https://www.virtualizationhowto.com/2016/10/prepare-active-directory-windows-server-2016-dc-adprep/
Se útil, por favor Classifique João C.X.Macedo Specialist Platforms Microsoft MCP,MCT,MCSA,MCTS,MCITP, ENTERPRISE VIRTUALIZATION WINDOWS SERVER 2008 R2,MCSE WINDOWS SERVER 2012,MCSA WINDOWS SERVER 2016